Electronic trailer brake controller



FIG. 1 is a right front perspective view of an electronic trailer brake controller showing my new design;

FIG. 2 is a left front perspective view of the controller shown in FIG. 1;

FIG. 3 is a rear elevational view of the controller shown in FIG. 1; and,

FIG. 4 is a bottom view of the controller shown in FIG. 1. 

The ornamental design for an electronic trailer brake controller, as shown and described. 